fixed errors

Author: sinanerdinc

tests/acceptance/mimesis_tests.robot

@@ -3,6 +3,7 @@ Documentation     Acceptance test suite for MimesisLibrary.
 ...               Verifies that all keyword categories return non-empty,
 ...               correctly typed values and that per-keyword locale override works.
 Library           MimesisLibrary    locale=EN
+Library           Collections
 
 *** Variables ***
 ${EXPECTED_UUID_LEN}     36
@@ -203,7 +204,7 @@ Fake Sentence Ends With Period
 Fake Hex Color Starts With Hash
     [Documentation]    Verify Fake Hex Color returns a '#RRGGBB' format string.
     ${color}=    Fake Hex Color
-    Should Start With    ${color}    #
+    Should Start With    ${color}    \#
     Length Should Be    ${color}    7
 
 Fake Words Returns Correct Count