doc: Fix markup

diff --git a/doc/MANUAL.adoc b/doc/MANUAL.adoc
index 1d06e694f1c6a425eee8362628320b5c22c93b9d..6b2b732cfccde6d17e7c717b6f11e3a14ff33f79 100644 (file)
--- a/doc/MANUAL.adoc
+++ b/doc/MANUAL.adoc
@@ -1595,7 +1595,7 @@ Disadvantages:
   or source code will make the hash different. Compare this with the default
   setup where ccache will fall back to the preprocessor mode, which is tolerant
   to some types of changes of compiler options and source code changes.
-* If -MD is used, the manifest entries will include system header files as
+* If `-MD` is used, the manifest entries will include system header files as
   well, thus slowing down cache hits slightly, just as using `-MD` slows down
   make. This is also the case for MSVC with `/showIncludes`.
 * If `-MMD` is used, the manifest entries will not include system header files,