display message improve in run

[lifubang]

Signed-off-by: Lifubang lifubang@acmcoder.com

- What I did

root@dockerdemo:~/gocode/src/github.com/docker/cli# build/docker --debug -H tcp://localhost:113 run -itd --name=test12 -p 32770:6379 redis
build/docker: Cannot connect to the Docker daemon at tcp://localhost:113. Is the docker daemon running?.
See 'build/docker run --help'.
root@dockerdemo:~/gocode/src/github.com/docker/cli#

There is "." after "?"
I think it looks ugly.

- How I did it
When [\n\r\!\.\?]$.MatchString(str), no need add "."

[codecov-io]

Codecov Report

Merging #1448 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@ Coverage Diff @@## master #1448 +/- ##
=========================================
+ Coverage 54.2% 54.2% +<.01% 
=========================================
Files 289 289 Lines 19378 19380 +2 =========================================
+ Hits 10503 10505 +2 
Misses 8199 8199 Partials 676 676

[thaJeztah]

Closing, as this code was removed in #5236