runtime(doc): mention special case of i_CTRL-R_-

closes: #12947
Signed-off-by: Christian Brabandt <cb@256bit.org>

diff --git a/runtime/doc/insert.txt b/runtime/doc/insert.txt
index ccf5178a8a7d7caf276de685ce6f109e5ec33e96..6248f742f7006ef14f6d639ca2468c00a22849ac 100644 (file)
--- a/runtime/doc/insert.txt
+++ b/runtime/doc/insert.txt
@@ -127,7 +127,11 @@ CTRL-R {register}                          *i_CTRL-R*
                        '/'     the last search pattern
                        ':'     the last command-line
                        '.'     the last inserted text
+                                                       *i_CTRL-R_-*
                        '-'     the last small (less than a line) delete
+                               register. This is repeatable using |.| since
+                               it remembers the register to put instead of
+                               the literal text to insert.
                                                        *i_CTRL-R_=*
                        '='     the expression register: you are prompted to
                                enter an expression (see |expression|)