file.recurse: exclude_pat not working when providing a list of glob patterns

Description of Issue

exclude_pat not working when providing a list of glob patterns
For the below state:

copyfiles:
  file.recurse:
    - name: /opt/path/
    - source: salt://temp
    - template: jinja
    - keep_source: False
    - exclude_pat: a*|b*

It will execute:

<UUID>:
----------
          ID: copyfiles
    Function: file.recurse
        Name: /opt/path/
      Result: True
     Comment: Recursively updated /opt/path/
     Started: 02:38:29.137763
    Duration: 1432.135 ms
     Changes:   
              ----------
              /opt/path/ab:
                  ----------
                  diff:
                      New file
                  mode:
                      0644
              /opt/path/ba:
                  ----------
                  diff:
                      New file
                  mode:
                      0644

Summary for <UUID>
------------
Succeeded: 1 (changed=1)
Failed:    0
------------
Total states run:     1
Total run time:   1.432 s

both ab and ba are copied, but according to the documentation:
https://docs.saltstack.com/en/develop/ref/states/all/salt.states.file.html

exclude_pat
Exclude this pattern, or list of patterns, from the source when copying. 

But changing to a list of regexp will make it work:

copyfiles:
  file.recurse:
    - name: /opt/path/
    - source: salt://temp
    - template: jinja
    - keep_source: False
    - exclude_pat: E@(a[a-zA-Z])|(b[a-zA-Z])

result in:

<UUID>:
----------
          ID: copyfiles
    Function: file.recurse
        Name: /opt/path/
      Result: True
     Comment: The directory /opt/path/ is in the correct state
     Started: 02:42:29.725374
    Duration: 392.615 ms
     Changes:   

Summary for <UUID>
------------
Succeeded: 1
Failed:    0
------------
Total states run:     1
Total run time: 392.615 ms

Setup

See above

Steps to Reproduce Issue

See above

Versions Report

Salt-master:

Salt Version:
           Salt: 2018.3.0
 
Dependency Versions:
           cffi: 1.12.3
       cherrypy: unknown
       dateutil: 2.5.3
      docker-py: Not Installed
          gitdb: Not Installed
      gitpython: Not Installed
          ioflo: Not Installed
         Jinja2: 2.10.1
        libgit2: 0.24.5
        libnacl: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.4.8
   mysql-python: Not Installed
      pycparser: 2.19
       pycrypto: 2.6.1
   pycryptodome: Not Installed
         pygit2: 0.24.2
         Python: 2.7.13 (default, Sep 26 2018, 18:42:22)
   python-gnupg: Not Installed
         PyYAML: 5.1.2
          PyZMQ: 18.1.0
           RAET: Not Installed
          smmap: Not Installed
        timelib: Not Installed
        Tornado: 4.4.3
            ZMQ: 4.3.2
 
System Versions:
           dist: debian 9.3 
         locale: ANSI_X3.4-1968
        machine: x86_64
        release: 4.14.127+
         system: Linux
        version: debian 9.3 

Minion:

Salt Version:
           Salt: 2018.3.0
 
Dependency Versions:
           cffi: 1.11.2
       cherrypy: Not Installed
       dateutil: 2.6.1
      docker-py: 3.7.2
          gitdb: Not Installed
      gitpython: Not Installed
          ioflo: Not Installed
         Jinja2: 2.10
        libgit2: Not Installed
        libnacl: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.5.4
   mysql-python: Not Installed
      pycparser: 2.17
       pycrypto: 2.6.1
   pycryptodome: Not Installed
         pygit2: Not Installed
         Python: 3.6.5 (default, Apr 05 2018, 13:30:06) [GCC]
   python-gnupg: Not Installed
         PyYAML: 3.12
          PyZMQ: 17.0.0
           RAET: Not Installed
          smmap: Not Installed
        timelib: Not Installed
        Tornado: 4.5.3
            ZMQ: 4.2.3
 
System Versions:
           dist:   
         locale: UTF-8
        machine: x86_64
        release: 4.12.14-150.14-default
         system: Linux
        version: Not Installed

Start at the Salt file.recurse entry point and trace how exclude_pat is processed when given glob patterns. Reproduce the a*|b* example and compare it with the working regular-expression example. Done means a list of glob patterns excludes matching files such as ab and ba, with regression coverage for the reported behavior.