The _brace_parameter completion function indicates that the expansion flags
B, E, M, and R can be used with the ${foo/bar/baz} syntax. According to the
documentation (zshexpn), this is not so:

The following flags are meaningful with the ${...#...} or ${...%...} forms.
> The S and I flags may also be used with the ${.../...} forms.
>

Testing and a brief glance at the source seem to confirm this, though my C
is not great — please let me know if i'm mistaken.

Credit to psprint in #zsh for discovering the wording problem.

dana

diff --git a/Completion/Zsh/Context/_brace_parameter
b/Completion/Zsh/Context/_brace_parameter
index f22db8895..b119ccd11 100644
--- a/Completion/Zsh/Context/_brace_parameter
+++ b/Completion/Zsh/Context/_brace_parameter
@@ -178,11 +178,11 @@ if [[ $PREFIX = *'${('[^\)]# ]]; then
     # "_:extended flags, for future expansion"
     "S:search substrings in #, %, / expressions"
     "I:search <argument>th match in #, %, / expressions"
-    "B:include index of beginning of match in #, %, / expressions"
-    "E:include index of one past end of match in #, %, / expressions"
-    "M:include matched portion in #, %, / expressions"
+    "B:include index of beginning of match in #, % expressions"
+    "E:include index of one past end of match in #, % expressions"
+    "M:include matched portion in #, % expressions"
     "N:include length of match in #, % expressions"
-    "R:include rest (unmatched portion) in #, %, / expressions"
+    "R:include rest (unmatched portion) in #, % expressions"
   )
   _describe -t flags "parameter flag" flags -Q -S ''
   return