docs/diff-options: clarify scope of diff-filter types

diff --git a/strbuf.h b/strbuf.h
index 4d225ffe51fc3ebc03bdc768bc53f85ad0a09bb8..80047b1bb7b826699deff3e8c2590a2a00a5c121 100644 (file)
--- a/strbuf.h
+++ b/strbuf.h
@@ -109,9 +109,7 @@ extern void strbuf_attach(struct strbuf *, void *, size_t, size_t);
  */
 static inline void strbuf_swap(struct strbuf *a, struct strbuf *b)
 {
-       struct strbuf tmp = *a;
-       *a = *b;
-       *b = tmp;
+       SWAP(*a, *b);
 }
 
 
@@ -443,6 +441,20 @@ extern int strbuf_getcwd(struct strbuf *sb);
  */
 extern void strbuf_add_absolute_path(struct strbuf *sb, const char *path);
 
+/**
+ * Canonize `path` (make it absolute, resolve symlinks, remove extra
+ * slashes) and append it to `sb`.  Die with an informative error
+ * message if there is a problem.
+ *
+ * The directory part of `path` (i.e., everything up to the last
+ * dir_sep) must denote a valid, existing directory, but the last
+ * component need not exist.
+ *
+ * Callers that don't mind links should use the more lightweight
+ * strbuf_add_absolute_path() instead.
+ */
+extern void strbuf_add_real_path(struct strbuf *sb, const char *path);
+
 
 /**
  * Normalize in-place the path contained in the strbuf. See