ReaderDictionary:dismissLookupInfo(): avoid forceRePaint()

Avoid forceRePaint() (and showing the full page without any
widget) between closing the "Looking up..." info message and
displaying the Dictionary result window, as it's not really
needed (I must have added it for symmetry with
ReaderDictionary:showLookupInfo() where it is needed.)
This avoids some occasional refresh competition glitches.

Also trim spaces at start or end of selection (can't hurt),
and replaced ugly string.gsub(text) with text:gsub().

frontend/apps/reader/modules/readerdictionary.lua

@@ -462,25 +462,31 @@ function ReaderDictionary:cleanSelection(text)
     -- some cleanup is still needed for selection we get from other engines
     -- (example: pdf selection "qu’autrefois," will be cleaned to "autrefois")
     --
+    -- Trim any space at start or end
+    text = text:gsub("^%s+", "")
+    text = text:gsub("%s+$", "")
     -- Replace extended quote (included in the general puncturation range)
     -- with plain ascii quote (for french words like "aujourd’hui")
-    text = string.gsub(text, "\xE2\x80\x99", "'") -- U+2019 (right single quotation mark)
+    text = text:gsub("\xE2\x80\x99", "'") -- U+2019 (right single quotation mark)
     -- Strip punctuation characters around selection
     text = util.stripePunctuations(text)
     -- Strip some common english grammatical construct
-    text = string.gsub(text, "'s$", '') -- english possessive
+    text = text:gsub("'s$", '') -- english possessive
     -- Strip some common french grammatical constructs
-    text = string.gsub(text, "^[LSDMNTlsdmnt]'", '') -- french l' s' t'...
-    text = string.gsub(text, "^[Qq][Uu]'", '') -- french qu'
+    text = text:gsub("^[LSDMNTlsdmnt]'", '') -- french l' s' t'...
+    text = text:gsub("^[Qq][Uu]'", '') -- french qu'
     -- Replace no-break space with regular space
-    text = string.gsub(text, "\xC2\xA0", ' ') -- U+00A0 no-break space
+    text = text:gsub("\xC2\xA0", ' ') -- U+00A0 no-break space
     -- There may be a need to remove some (all?) diacritical marks
     -- https://en.wikipedia.org/wiki/Combining_character#Unicode_ranges
     -- see discussion at https://github.com/koreader/koreader/issues/1649
     -- Commented for now, will have to be checked by people who read
     -- languages and texts that use them.
-    -- text = string.gsub(text, "\204[\128-\191]", '') -- U+0300 to U+033F
-    -- text = string.gsub(text, "\205[\128-\175]", '') -- U+0340 to U+036F
+    -- text = text:gsub("\204[\128-\191]", '') -- U+0300 to U+033F
+    -- text = text:gsub("\205[\128-\175]", '') -- U+0340 to U+036F
+    -- Trim any space now at start or end after above changes
+    text = text:gsub("^%s+", "")
+    text = text:gsub("%s+$", "")
     return text
 end
 
@@ -494,7 +500,7 @@ end
 function ReaderDictionary:dismissLookupInfo()
     if self.lookup_progress_msg then
         UIManager:close(self.lookup_progress_msg)
-        UIManager:forceRePaint()
+        -- UIManager:forceRePaint()
     end
     self.lookup_progress_msg = nil
 end