Reflow paragraphs in comments.

This is intended as a clean up after the big clang-format commit
(r280751), which unfortunately resulted in many of the comment
paragraphs in LLDB being very hard to read.

FYI, the script I used was:

import textwrap
import commands
import os
import sys
import re
tmp = "%s.tmp"%sys.argv[1]
out = open(tmp, "w+")
with open(sys.argv[1], "r") as f:
  header = ""
  text = ""
  comment = re.compile(r'^( *//) ([^ ].*)$')
  special = re.compile(r'^((([A-Z]+[: ])|([0-9]+ )).*)|(.*;)$')
  for line in f:
      match = comment.match(line)
      if match and not special.match(match.group(2)):
          # skip intentionally short comments.
          if not text and len(match.group(2)) < 40:
              out.write(line)
              continue

          if text:
              text += " " + match.group(2)
          else:
              header = match.group(1)
              text = match.group(2)

          continue

      if text:
          filled = textwrap.wrap(text, width=(78-len(header)),
                                 break_long_words=False)
          for l in filled:
              out.write(header+" "+l+'\n')
              text = ""

      out.write(line)

os.rename(tmp, sys.argv[1])

Differential Revision: https://reviews.llvm.org/D46144

llvm-svn: 331197
diff --git a/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp b/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp
index 5e8f051..82b7ac1 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/BlockPointer.cpp
@@ -147,9 +147,8 @@
     return child_sp;
   }
 
-  // return true if this object is now safe to use forever without
-  // ever updating again; the typical (and tested) answer here is
-  // 'false'
+  // return true if this object is now safe to use forever without ever
+  // updating again; the typical (and tested) answer here is 'false'
   bool Update() override { return false; }
 
   // maybe return false if the block pointer is, say, null
diff --git a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
index 622b66d..1aa48e4 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp
@@ -120,10 +120,9 @@
 
 static bool IsTrivialBasename(const llvm::StringRef &basename) {
   // Check that the basename matches with the following regular expression
-  // "^~?([A-Za-z_][A-Za-z_0-9]*)$"
-  // We are using a hand written implementation because it is significantly more
-  // efficient then
-  // using the general purpose regular expression library.
+  // "^~?([A-Za-z_][A-Za-z_0-9]*)$" We are using a hand written implementation
+  // because it is significantly more efficient then using the general purpose
+  // regular expression library.
   size_t idx = 0;
   if (basename.size() > 0 && basename[0] == '~')
     idx = 1;
@@ -151,10 +150,9 @@
 }
 
 bool CPlusPlusLanguage::MethodName::TrySimplifiedParse() {
-  // This method tries to parse simple method definitions
-  // which are presumably most comman in user programs.
-  // Definitions that can be parsed by this function don't have return types
-  // and templates in the name.
+  // This method tries to parse simple method definitions which are presumably
+  // most comman in user programs. Definitions that can be parsed by this
+  // function don't have return types and templates in the name.
   // A::B::C::fun(std::vector<T> &) const
   size_t arg_start, arg_end;
   llvm::StringRef full(m_full.GetCString());
@@ -251,8 +249,8 @@
 }
 
 bool CPlusPlusLanguage::IsCPPMangledName(const char *name) {
-  // FIXME!! we should really run through all the known C++ Language
-  // plugins and ask each one if this is a C++ mangled name
+  // FIXME!! we should really run through all the known C++ Language plugins
+  // and ask each one if this is a C++ mangled name
   
   if (name == nullptr)
     return false;
diff --git a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusNameParser.cpp b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusNameParser.cpp
index a992b72..b32fe95 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusNameParser.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusNameParser.cpp
@@ -25,8 +25,8 @@
   m_next_token_index = 0;
   Optional<ParsedFunction> result(None);
 
-  // Try to parse the name as function without a return type specified
-  // e.g. main(int, char*[])
+  // Try to parse the name as function without a return type specified e.g.
+  // main(int, char*[])
   {
     Bookmark start_position = SetBookmark();
     result = ParseFunctionImpl(false);
@@ -34,8 +34,8 @@
       return result;
   }
 
-  // Try to parse the name as function with function pointer return type
-  // e.g. void (*get_func(const char*))()
+  // Try to parse the name as function with function pointer return type e.g.
+  // void (*get_func(const char*))()
   result = ParseFuncPtr(true);
   if (result)
     return result;
@@ -183,13 +183,13 @@
   Advance();
 
   // Consuming template arguments is a bit trickier than consuming function
-  // arguments, because '<' '>' brackets are not always trivially balanced.
-  // In some rare cases tokens '<' and '>' can appear inside template arguments
-  // as arithmetic or shift operators not as template brackets.
-  // Examples: std::enable_if<(10u)<(64), bool>
+  // arguments, because '<' '>' brackets are not always trivially balanced. In
+  // some rare cases tokens '<' and '>' can appear inside template arguments as
+  // arithmetic or shift operators not as template brackets. Examples:
+  // std::enable_if<(10u)<(64), bool>
   //           f<A<operator<(X,Y)::Subclass>>
-  // Good thing that compiler makes sure that really ambiguous cases of
-  // '>' usage should be enclosed within '()' brackets.
+  // Good thing that compiler makes sure that really ambiguous cases of '>'
+  // usage should be enclosed within '()' brackets.
   int template_counter = 1;
   bool can_open_template = false;
   while (HasMoreTokens() && template_counter > 0) {
@@ -208,9 +208,9 @@
     case tok::less:
       // '<' is an attempt to open a subteamplte
       // check if parser is at the point where it's actually possible,
-      // otherwise it's just a part of an expression like 'sizeof(T)<(10)'.
-      // No need to do the same for '>' because compiler actually makes sure
-      // that '>' always surrounded by brackets to avoid ambiguity.
+      // otherwise it's just a part of an expression like 'sizeof(T)<(10)'. No
+      // need to do the same for '>' because compiler actually makes sure that
+      // '>' always surrounded by brackets to avoid ambiguity.
       if (can_open_template)
         ++template_counter;
       can_open_template = false;
@@ -388,10 +388,9 @@
 bool CPlusPlusNameParser::ConsumeBuiltinType() {
   bool result = false;
   bool continue_parsing = true;
-  // Built-in types can be made of a few keywords
-  // like 'unsigned long long int'. This function
-  // consumes all built-in type keywords without
-  // checking if they make sense like 'unsigned char void'.
+  // Built-in types can be made of a few keywords like 'unsigned long long
+  // int'. This function consumes all built-in type keywords without checking
+  // if they make sense like 'unsigned char void'.
   while (continue_parsing && HasMoreTokens()) {
     switch (Peek().getKind()) {
     case tok::kw_short:
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
index f6d1f18..95e02a4 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -123,12 +123,11 @@
   
   static ConstString g___i_("__i_");
   
-  // this must be a ValueObject* because it is a child of the ValueObject we are
-  // producing children for
-  // it if were a ValueObjectSP, we would end up with a loop (iterator ->
-  // synthetic -> child -> parent == iterator)
-  // and that would in turn leak memory by never allowing the ValueObjects to
-  // die and free their memory
+  // this must be a ValueObject* because it is a child of the ValueObject we
+  // are producing children for it if were a ValueObjectSP, we would end up
+  // with a loop (iterator -> synthetic -> child -> parent == iterator) and
+  // that would in turn leak memory by never allowing the ValueObjects to die
+  // and free their memory
   m_pair_ptr = valobj_sp
                    ->GetValueForExpressionPath(
                        ".__i_.__ptr_->__value_", nullptr, nullptr,
@@ -386,7 +385,8 @@
 };
 
 // this function abstracts away the layout and mode details of a libc++ string
-// and returns the address of the data and the size ready for callers to consume
+// and returns the address of the data and the size ready for callers to
+// consume
 static bool ExtractLibcxxStringInfo(ValueObject &valobj,
                                     ValueObjectSP &location_sp,
                                     uint64_t &size) {
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxxList.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxxList.cpp
index 6407ae1..6066f14 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxxList.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxxList.cpp
@@ -206,8 +206,7 @@
 
   if (m_loop_detected == 0) {
     // This is the first time we are being run (after the last update). Set up
-    // the loop
-    // invariant for the first element.
+    // the loop invariant for the first element.
     m_slow_runner = ListEntry(m_head).next();
     m_fast_runner = m_slow_runner.next();
     m_loop_detected = 1;
@@ -215,9 +214,8 @@
 
   // Loop invariant:
   // Loop detection has been run over the first m_loop_detected elements. If
-  // m_slow_runner ==
-  // m_fast_runner then the loop has been detected after m_loop_detected
-  // elements.
+  // m_slow_runner == m_fast_runner then the loop has been detected after
+  // m_loop_detected elements.
   const size_t steps_to_run = std::min(count, m_count);
   while (m_loop_detected < steps_to_run && m_slow_runner && m_fast_runner &&
          m_slow_runner != m_fast_runner) {
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp
index be96a6d..8f82bdc 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxxMap.cpp
@@ -382,8 +382,8 @@
         return lldb::ValueObjectSP();
       }
     } else {
-      // because of the way our debug info is made, we need to read item 0 first
-      // so that we can cache information used to generate other elements
+      // because of the way our debug info is made, we need to read item 0
+      // first so that we can cache information used to generate other elements
       if (m_skip_size == UINT32_MAX)
         GetChildAtIndex(0);
       if (m_skip_size == UINT32_MAX) {
diff --git a/lldb/source/Plugins/Language/CPlusPlus/LibStdcppUniquePointer.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibStdcppUniquePointer.cpp
index 19b0e88..dde7597 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibStdcppUniquePointer.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibStdcppUniquePointer.cpp
@@ -71,8 +71,8 @@
   ValueObjectSP obj_subchild_sp =
       obj_child_sp->GetChildMemberWithName(ConstString("_M_t"), true);
 
-  // if there is a _M_t subchild, the tuple is found in
-  // the obj_subchild_sp (for libstdc++ 6.0.23).
+  // if there is a _M_t subchild, the tuple is found in the obj_subchild_sp
+  // (for libstdc++ 6.0.23).
   if (obj_subchild_sp) {
     return obj_subchild_sp;
   }