Python: Update test expectations.

As ar as I can tell, all these are improvements

python/ql/test/library-tests/regex/Characters.expected

@@ -110,7 +110,6 @@
 | ax{3,} | 5 | 6 |
 | ax{3} | 0 | 1 |
 | ax{3} | 1 | 2 |
-| ax{3} | 2 | 3 |
 | ax{3} | 3 | 4 |
 | ax{3} | 4 | 5 |
 | ax{,3} | 0 | 1 |

python/ql/test/library-tests/regex/FirstLast.expected

@@ -84,6 +84,8 @@
 | ax{3,} | last | 1 | 6 |
 | ax{3,} | last | 5 | 6 |
 | ax{3} | first | 0 | 1 |
+| ax{3} | last | 1 | 2 |
+| ax{3} | last | 1 | 5 |
 | ax{3} | last | 4 | 5 |
 | ax{,3} | first | 0 | 1 |
 | ax{,3} | last | 0 | 1 |

python/ql/test/library-tests/regex/Qualified.expected

@@ -11,4 +11,5 @@
 | ^[A-Z_]+$(?<!not-this) | 1 | 8 | false |
 | ax{01,3} | 1 | 8 | false |
 | ax{3,} | 1 | 6 | false |
+| ax{3} | 1 | 5 | false |
 | ax{,3} | 1 | 6 | true |

python/ql/test/library-tests/regex/Regex.expected

@@ -207,9 +207,9 @@
 | ax{3,} | sequence | 0 | 6 |
 | ax{3} | char | 0 | 1 |
 | ax{3} | char | 1 | 2 |
-| ax{3} | char | 2 | 3 |
 | ax{3} | char | 3 | 4 |
 | ax{3} | char | 4 | 5 |
+| ax{3} | qualified | 1 | 5 |
 | ax{3} | sequence | 0 | 5 |
 | ax{,3} | char | 0 | 1 |
 | ax{,3} | char | 1 | 2 |