Fix comment typo in common.h
diff --git a/include/git2/common.h b/include/git2/common.h
index a8f8d8e..0e93798 100644
--- a/include/git2/common.h
+++ b/include/git2/common.h
@@ -77,7 +77,7 @@ GIT_BEGIN_DECL
#endif
/**
- * The maximum length of a git valid git path.
+ * The maximum length of a valid git path.
*/
#define GIT_PATH_MAX 4096