enh(shell) allow period in prompt match (#4244)

Allow a "." to match in the prompt section of shell/console examples.

Author: ianw

CHANGES.md

@@ -13,6 +13,7 @@ Core Grammars:
 - fix(ex) adds support for `?'` char literal and missing `defguardp` keyword [Kevin Bloch][]
 - fix(diff) fix unified diff hunk header regex to allow unpaired numbers [Chris Wilson][]
 - enh(php) support single line and hash comments in attributes, constructor and functions [Antoine Musso][]
+- enh(shell) match period (.) as part of shell prompt [Ian Wienand][]
 
 CONTRIBUTORS
 
@@ -23,6 +24,7 @@ CONTRIBUTORS
 [Chris Wilson]: https://github.com/sushicw
 [Antoine Musso]: https://github.com/hashar
 [Chester Moses]: https://github.com/Chester-Moses-HCL
+[Ian Wienand]: https://github.com/ianw
 
 
 ## Version 11.11.1

src/languages/shell.js

@@ -20,7 +20,7 @@ export default function(hljs) {
         // We cannot add \s (spaces) in the regular expression otherwise it will be too broad and produce unexpected result.
         // For instance, in the following example, it would match "echo /path/to/home >" as a prompt:
         // echo /path/to/home > t.exe
-        begin: /^\s{0,3}[/~\w\d[\]()@-]*[>%$#][ ]?/,
+        begin: /^\s{0,3}[./~\w\d[\]()@-]*[>%$#][ ]?/,
         starts: {
           end: /[^\\](?=\s*$)/,
           subLanguage: 'bash'

test/markup/shell/prompt-with-slash.expect.txt

@@ -1,6 +1,6 @@
-<span class="hljs-meta prompt_">pao-sw-a04-40(config)# </span><span class="language-bash">interface range ethernet 1/1/1-1/1/9</span>
-<span class="hljs-meta prompt_">pao-sw-a04-42(conf-range-eth1/1/1-1/1/9)# </span><span class="language-bash">switchport trunk allowed vlan 1102</span>
-<span class="hljs-meta prompt_">pao-sw-a04-42(conf-range-eth1/1/1-1/1/9)# </span><span class="language-bash">show configuration</span>
+<span class="hljs-meta prompt_">pao.sw.a04-40(config)# </span><span class="language-bash">interface range ethernet 1/1/1-1/1/9</span>
+<span class="hljs-meta prompt_">pao.sw.a04-42(conf-range-eth1/1/1-1/1/9)# </span><span class="language-bash">switchport trunk allowed vlan 1102</span>
+<span class="hljs-meta prompt_">pao.sw.a04-42(conf-range-eth1/1/1-1/1/9)# </span><span class="language-bash">show configuration</span>
 !
 interface ethernet1/1/1
  description pao-sw-a03-09_port56

test/markup/shell/prompt-with-slash.txt

@@ -1,6 +1,6 @@
-pao-sw-a04-40(config)# interface range ethernet 1/1/1-1/1/9
-pao-sw-a04-42(conf-range-eth1/1/1-1/1/9)# switchport trunk allowed vlan 1102
-pao-sw-a04-42(conf-range-eth1/1/1-1/1/9)# show configuration
+pao.sw.a04-40(config)# interface range ethernet 1/1/1-1/1/9
+pao.sw.a04-42(conf-range-eth1/1/1-1/1/9)# switchport trunk allowed vlan 1102
+pao.sw.a04-42(conf-range-eth1/1/1-1/1/9)# show configuration
 !
 interface ethernet1/1/1
  description pao-sw-a03-09_port56