Expand the file name match so that the match end can be used to limit path character substitution.

tools/emacs/trybot-windows.txt

Index: tools/emacs/trybot-windows.txt
diff --git a/tools/emacs/trybot-windows.txt b/tools/emacs/trybot-windows.txt
index 95853cde23d2c41a92a5b69ba0f6e606205282c2..50e634d649f00eac6dc5610a0aecb4f5371370f6 100644
--- a/tools/emacs/trybot-windows.txt
+++ b/tools/emacs/trybot-windows.txt
@@ -19,7 +19,7 @@ toolband_proxy_lib - 0 error(s), 0 warning(s)
 --------------------Configuration: webcore_bindings - Debug|Win32--------------
 Compiling...
 CSSGrammar.cpp
-e:\b\build\slave\win\build\src\third_party\webkit\javascriptcore\wtf\text\StringImpl.h(90) : warning C4355: 'this' : used in base member initializer list
+e:\b\build\slave\win\build\src\third_party\webkit\javascriptcore\wtf\text\StringImpl.h(90) : warning C4355: 'this' : used in \base\ member initializer list

[evanm, 2010/12/01 18:59:57]

I just now realized what you're doing here; it might be clearer to instead add
at the end of the error message something like:
 and here is a backslash for testing: \

 e:\b\build\slave\win\build\src\third_party\webkit\webcore\dom\ViewportArguments.h(78) : warning C4305: 'initializing' : truncation from '' to 'bool'
 e:\b\build\slave\win\build\src\build\Debug\obj\global_intermediate\webkit\CSSGrammar.cpp(1930) : warning C4065: switch statement contains 'default' but no 'case' labels
 V8DerivedSources1.cpp