Consistent tuple variable naming

Author: Enkidu93

src/SIL.Machine/PunctuationAnalysis/TextSegment.cs

@@ -189,8 +189,8 @@ public SurrogatePairString(string stringValue)
             _stringValue = stringValue;
             IEnumerable<(int StringIndex, int SurrogatePairIndex)> indexPairs = _stringValue
                 .Select((c, stringIndex) => (c, stringIndex))
-                .Where(tup => !char.IsLowSurrogate(tup.c))
-                .Select((tup, surrogatePairIndex) => (tup.stringIndex, surrogatePairIndex));
+                .Where(tuple => !char.IsLowSurrogate(tuple.c))
+                .Select((tuple, surrogatePairIndex) => (tuple.stringIndex, surrogatePairIndex));
             _surrogatePairIndexByStringIndex = new Dictionary<int, int>();
             _stringIndexBySurrogatePairIndex = new Dictionary<int, int>();
             foreach ((int stringIndex, int surrogatePairIndex) in indexPairs)

tests/SIL.Machine.Tests/PunctuationAnalysis/QuotationDenormalizationTests.cs

@@ -44,12 +44,12 @@ of the field which Yahweh God had made.
         List<(int ChapterNumber, QuotationMarkUpdateStrategy Strategy)> bestChapterStrategies =
             quotationMarkDenormalizationFirstPass.FindBestChapterStrategies();
 
-        Assert.That(bestChapterStrategies.Select(tup => tup.ChapterNumber).SequenceEqual([1]));
+        Assert.That(bestChapterStrategies.Select(tuple => tuple.ChapterNumber).SequenceEqual([1]));
 
         var quotationMarkDenormalizer = new QuotationMarkDenormalizationUsfmUpdateBlockHandler(
             standardEnglishQuoteConvention,
             new QuotationMarkUpdateSettings(
-                chapterStrategies: bestChapterStrategies.Select(tup => tup.Strategy).ToList()
+                chapterStrategies: bestChapterStrategies.Select(tuple => tuple.Strategy).ToList()
             )
         );
 

tests/SIL.Machine.Tests/PunctuationAnalysis/QuotationMarkUpdateFirstPassTests.cs

@@ -749,7 +749,7 @@ string targetQuoteConventionName
         var firstPassAnalyzer = new QuotationMarkUpdateFirstPass(sourceQuoteConvention, targetQuoteConvention);
         UsfmParser.Parse(normalizedUsfm, firstPassAnalyzer);
 
-        return firstPassAnalyzer.FindBestChapterStrategies().Select(tup => tup.Strategy).ToList();
+        return firstPassAnalyzer.FindBestChapterStrategies().Select(tuple => tuple.Strategy).ToList();
     }
 
     private static QuotationMarkUpdateStrategy RunFirstPassOnChapter(