add tests for examples in lua style documentation

And fix all the errors the tests have found.

settings/flex-base.lua

@@ -461,8 +461,8 @@ end
 
 function module.set_prefilters(data)
     PRE_DELETE = module.tag_match{keys = data.delete_keys, tags = data.delete_tags}
-    PRE_EXTRAS = module.tag_match{keys = data.extratag_keys,
-                                  tags = data.extratag_tags}
+    PRE_EXTRAS = module.tag_match{keys = data.extra_keys,
+                                  tags = data.extra_tags}
 end
 
 function module.set_main_tags(data)
@@ -484,12 +484,12 @@ end
 
 function module.set_unused_handling(data)
     if data.extra_keys == nil and data.extra_tags == nil then
-        POST_DELETE = module.tag_match{data.delete_keys, tags = data.delete_tags}
+        POST_DELETE = module.tag_match{keys = data.delete_keys, tags = data.delete_tags}
         POST_EXTRAS = nil
         SAVE_EXTRA_MAINS = true
     elseif data.delete_keys == nil and data.delete_tags == nil then
         POST_DELETE = nil
-        POST_EXTRAS = module.tag_match{data.extra_keys, tags = data.extra_tags}
+        POST_EXTRAS = module.tag_match{keys = data.extra_keys, tags = data.extra_tags}
         SAVE_EXTRA_MAINS = false
     else
         error("unused handler can have only 'extra_keys' or 'delete_keys' set.")

settings/import-address.lua

@@ -1,4 +1,4 @@
-flex = require('flex-base')
+local flex = require('flex-base')
 
 flex.set_main_tags{
     highway = {'always',
@@ -32,7 +32,7 @@ flex.set_prefilters{delete_keys = {'building', 'source',
                                               'noexit', 'crossing', 'give_way', 'stop'},
                                    landuse = {'cemetry', 'no'},
                                    boundary = {'place'}},
-                    extratag_keys = {'wikipedia', 'wikipedia:*', 'wikidata', 'capital', 'area'}
+                    extra_keys = {'wikipedia', 'wikipedia:*', 'wikidata', 'capital', 'area'}
                    }
 
 flex.set_name_tags{main = {'name', 'name:*',
@@ -65,3 +65,5 @@ flex.set_address_tags{main = {'addr:housenumber',
 
 
 flex.set_unused_handling{extra_keys = {'place'}}
+
+return flex

settings/import-admin.lua

@@ -15,7 +15,7 @@ flex.set_prefilters{delete_keys = {'building', 'source', 'highway',
                                    'addr:street:name', 'addr:street:type'},
                     delete_tags = {landuse = {'cemetry', 'no'},
                                    boundary = {'place'}},
-                    extratag_keys = {'wikipedia', 'wikipedia:*', 'wikidata', 'capital'}
+                    extra_keys = {'wikipedia', 'wikipedia:*', 'wikidata', 'capital'}
                    }
 
 flex.set_name_tags{main = {'name', 'name:*',
@@ -42,3 +42,5 @@ flex.set_address_tags{extra = {'addr:*', 'is_in:*'},
                      }
 
 flex.set_unused_handling{extra_keys = {'place'}}
+
+return flex

settings/import-extratags.lua

@@ -1,4 +1,4 @@
-flex = require('flex-base')
+local flex = require('flex-base')
 
 flex.set_main_tags{
     building = 'fallback',
@@ -74,7 +74,7 @@ flex.set_prefilters{delete_keys = {'note', 'note:*', 'source', '*source', 'attri
                                    waterway = {'riverbank'},
                                    building = {'no'},
                                    boundary = {'place'}},
-                    extratag_keys = {'*:prefix', '*:suffix', 'name:prefix:*', 'name:suffix:*',
+                    extra_keys = {'*:prefix', '*:suffix', 'name:prefix:*', 'name:suffix:*',
                                'name:etymology', 'name:signed', 'name:botanical',
                                'wikidata', '*:wikidata',
                                'addr:street:name', 'addr:street:type'}
@@ -110,3 +110,5 @@ flex.set_address_tags{main = {'addr:housenumber',
 
 
 flex.set_unused_handling{delete_keys = {'tiger:*'}}
+
+return flex

settings/import-full.lua

@@ -1,4 +1,4 @@
-flex = require('flex-base')
+local flex = require('flex-base')
 
 flex.set_main_tags{
     building = 'fallback',
@@ -74,7 +74,7 @@ flex.set_prefilters{delete_keys = {'note', 'note:*', 'source', '*source', 'attri
                                    waterway = {'riverbank'},
                                    building = {'no'},
                                    boundary = {'place'}},
-                    extratag_keys = {'*:prefix', '*:suffix', 'name:prefix:*', 'name:suffix:*',
+                    extra_keys = {'*:prefix', '*:suffix', 'name:prefix:*', 'name:suffix:*',
                                'name:etymology', 'name:signed', 'name:botanical',
                                'wikidata', '*:wikidata',
                                'addr:street:name', 'addr:street:type'}
@@ -110,3 +110,5 @@ flex.set_address_tags{main = {'addr:housenumber',
 
 
 flex.set_unused_handling{extra_keys = {'place'}}
+
+return flex

settings/import-street.lua

@@ -1,4 +1,4 @@
-flex = require('flex-base')
+local flex = require('flex-base')
 
 flex.set_main_tags{
     highway = {'always',
@@ -32,7 +32,7 @@ flex.set_prefilters{delete_keys = {'building', 'source',
                                               'noexit', 'crossing', 'give_way', 'stop'},
                                    landuse = {'cemetry', 'no'},
                                    boundary = {'place'}},
-                    extratag_keys = {'wikipedia', 'wikipedia:*', 'wikidata', 'capital', 'area'}
+                    extra_keys = {'wikipedia', 'wikipedia:*', 'wikidata', 'capital', 'area'}
                    }
 
 flex.set_name_tags{main = {'name', 'name:*',
@@ -64,3 +64,5 @@ flex.set_address_tags{main = {'addr:housenumber',
                      }
 
 flex.set_unused_handling{extra_keys = {'place'}}
+
+return flex