Fix a tranche of comment, test and doc typos

llvm-svn: 196510
diff --git a/clang/lib/Format/BreakableToken.cpp b/clang/lib/Format/BreakableToken.cpp
index a08102a..29deff9 100644
--- a/clang/lib/Format/BreakableToken.cpp
+++ b/clang/lib/Format/BreakableToken.cpp
@@ -335,7 +335,7 @@
   LeadingWhitespace[LineIndex] =
       Lines[LineIndex].begin() - Lines[LineIndex - 1].end();
 
-  // Adjust the start column uniformly accross all lines.
+  // Adjust the start column uniformly across all lines.
   StartOfLineColumn[LineIndex] = std::max<int>(
       0,
       encoding::columnWidthWithTabs(Whitespace, 0, Style.TabWidth, Encoding) +