[lit] Move the recursiveExpansionLimit setting to TestingConfig
The LitConfig is shared across the whole test suite. However, since
enabling recursive expansion can be a breaking change for some test
suites, it's important to confine the setting to test suites that
enable it explicitly.
Note that other issues were raised with the way recursiveExpansionLimit
operates. However, this commit simply moves the setting to the right
place -- the mechanism by which it works can be improved independently.
Differential Revision: https://reviews.llvm.org/D77415
diff --git a/llvm/docs/CommandGuide/lit.rst b/llvm/docs/CommandGuide/lit.rst
index ebb89d2..bbd739f 100644
--- a/llvm/docs/CommandGuide/lit.rst
+++ b/llvm/docs/CommandGuide/lit.rst
@@ -457,10 +457,10 @@
By default, substitutions are expanded exactly once, so that if e.g. a
substitution ``%build`` is defined in top of another substitution ``%cxx``,
``%build`` will expand to ``%cxx`` textually, not to what ``%cxx`` expands to.
-However, if the ``recursiveExpansionLimit`` property of the ``LitConfig`` is
-set to a non-negative integer, substitutions will be expanded recursively until
-that limit is reached. It is an error if the limit is reached and expanding
-substitutions again would yield a different result.
+However, if the ``recursiveExpansionLimit`` property of the ``TestingConfig``
+is set to a non-negative integer, substitutions will be expanded recursively
+until that limit is reached. It is an error if the limit is reached and
+expanding substitutions again would yield a different result.
More detailed information on substitutions can be found in the
:doc:`../TestingGuide`.