docs/cmd-start: add code block languages, monospace formatting

Change-Id: I16540d22795eb1e4ca54f537cc8331ee0b611613
diff --git a/src/main/resources/Documentation/cmd-start.md b/src/main/resources/Documentation/cmd-start.md
index 28aca19..e1b7341 100644
--- a/src/main/resources/Documentation/cmd-start.md
+++ b/src/main/resources/Documentation/cmd-start.md
@@ -7,7 +7,8 @@
 
 SYNOPSIS
 --------
-```
+
+```console
 ssh -p @SSH_PORT@ @SSH_HOST@ @PLUGIN@ start
   [--now]
   [--wait]
@@ -57,14 +58,14 @@
 
 If you get message "Nothing to replicate" while running this command,
 it may be caused by several reasons, such as you give a wrong url
-pattern in command options, or the authGroup in the replication.config
+pattern in command options, or the authGroup in the `replication.config`
 has no read access for the replicated projects.
 
 If one or several project patterns are supplied, only those projects
 conforming to both this/these pattern(s) and those defined in
-replication.config for the target host(s) are queued for replication.
+`replication.config` for the target host(s) are queued for replication.
 
-The patterns follow the same format as those in replication.config,
+The patterns follow the same format as those in `replication.config`,
 where wildcard or regular expression patterns can be given.
 Regular expression patterns must match a complete project name to be
 considered a match.
@@ -105,39 +106,39 @@
 --------
 Replicate every project, to every configured remote:
 
-```
+```console
   $ ssh -p @SSH_PORT@ @SSH_HOST@ @PLUGIN@ start --all
 ```
 
 Replicate only to `srv2` now that it is back online:
 
-```
+```console
   $ ssh -p @SSH_PORT@ @SSH_HOST@ @PLUGIN@ start --url srv2 --all
 ```
 
 Replicate only the `tools/gerrit` project, after deleting a ref
 locally by hand:
 
-```
+```console
   $ git --git-dir=/home/git/tools/gerrit.git update-ref -d refs/changes/00/100/1
   $ ssh -p @SSH_PORT@ @SSH_HOST@ @PLUGIN@ start tools/gerrit
 ```
 
 Replicate only projects located in the `documentation` subdirectory:
 
-```
+```console
   $ ssh -p @SSH_PORT@ @SSH_HOST@ @PLUGIN@ start documentation/*
 ```
 
 Replicate projects whose path includes a folder named `vendor` to host replica1:
 
-```
+```console
   $ ssh -p @SSH_PORT@ @SSH_HOST@ @PLUGIN@ start --url replica1 ^(|.*/)vendor(|/.*)
 ```
 
 Replicate to only one specific destination URL:
 
-```
+```console
   $ ssh -p @SSH_PORT@ @SSH_HOST@ @PLUGIN@ start --url https://example.com/tools/gerrit.git
 ```