doc: trim-left: don't document string case as fixed regex

* txr.1: Though it's not wrong, let's describe the
string case as a fixed match without mentioning regex.

1 files changed, 2 insertions, 2 deletions

diff --git a/txr.1 b/txr.1
index c34aa421..a98fe150 100644
--- a/txr.1
+++ b/txr.1
@@ -54099,8 +54099,8 @@ matches all of
 then the empty string is returned.
 
 If the first argument is a character string, then it is treated
-as if it were a regular-expression match for that literal
-sequence of characters. Thus,
+as an exact match for that sequence of
+characters.  Thus,
 .code trim-left
 interprets that string as a
 .meta prefix