Added a test for whitespace collapsing.

Tests gregorio-project/gregorio#1111.

tests/gabc-gtex/newlines.gabc

@@ -0,0 +1,15 @@
+name: newlines;
+%%
+(c3)
+one(f) two(g)
+three
+four(h)
+five
+
+six(i)
+seven
+(j)
+eignt
+
+nine(k)
+(::)

tests/gabc-gtex/newlines.tex

@@ -0,0 +1,63 @@
+% File generated by gregorio 4.2.0-beta1-release-4.2-61ac29e-3742
+\GregorioTeXAPIVersion{4.2.0-beta1}%
+% Name: newlines
+\GreBeginHeaders %
+\GreHeader{name}{newlines}%
+\GreEndHeaders %
+\GreBeginScore{57131644399b17c446ca35b5f58d016df191ce67}{13}{8}{0}{0}{}{4}%
+\GreScoreOpening{%
+}{%
+\GreSetInitialClef{c}{3}{3}{c}{0}{3}%
+}{%
+}{\GreSyllable}{\GreSetFirstSyllableText{o}{n}{e}{{\GreFirstWord{\GreFirstSyllable{\GreFirstSyllableInitial{n}}}}{\GreFirstWord{\GreFirstSyllable{e}}}{}}{{}{\GreFirstWord{\GreFirstSyllable{\GreFirstSyllableInitial{o}}}}{\GreFirstWord{\GreFirstSyllable{ne}}}}{}}{}{\GreFirstWord}{1}{\GreSetNextSyllable{tw}{o}{}{t}{wo}}{}{0}{}{%
+\GreSyllableNoteCount{1}%
+\GreGlyph{\GreCPPunctum}{8}{\GreNextCustos{9}{}}{0}%
+{%
+\GreGlyphHeights{8}{8}%
+}{}{}%
+}%
+%
+\GreSyllable{\GreSetThisSyllable{tw}{o}{}{t}{wo}}{}{\GreUnstyled}{1}{\GreSetNextSyllable{thr}{ee}{ four}{t}{hree four}}{}{0}{}{%
+\GreSyllableNoteCount{1}%
+\GreGlyph{\GreCPPunctum}{9}{\GreNextCustos{10}{}}{0}%
+{%
+\GreGlyphHeights{9}{9}%
+}{}{}%
+}%
+%
+\GreSyllable{\GreSetThisSyllable{thr}{ee}{ four}{t}{hree four}}{}{\GreUnstyled}{1}{\GreSetNextSyllable{f}{i}{ve six}{f}{ive six}}{}{0}{}{%
+\GreSyllableNoteCount{1}%
+\GreGlyph{\GreCPPunctum}{10}{\GreNextCustos{11}{}}{0}%
+{%
+\GreGlyphHeights{10}{10}%
+}{}{}%
+}%
+%
+\GreSyllable{\GreSetThisSyllable{f}{i}{ve six}{f}{ive six}}{}{\GreUnstyled}{1}{\GreSetNextSyllable{s}{e}{ven }{s}{even }}{}{0}{}{%
+\GreSyllableNoteCount{1}%
+\GreGlyph{\GreCPPunctum}{11}{\GreNextCustos{12}{}}{0}%
+{%
+\GreGlyphHeights{11}{11}%
+}{}{}%
+}%
+%
+\GreSyllable{\GreSetThisSyllable{s}{e}{ven }{s}{even }}{}{\GreUnstyled}{1}{\GreSetNextSyllable{}{ei}{gnt nine}{e}{ignt nine}}{}{0}{}{%
+\GreSyllableNoteCount{1}%
+\GreGlyph{\GreCPPunctum}{12}{\GreNextCustos{13}{}}{0}%
+{%
+\GreGlyphHeights{12}{12}%
+}{}{}%
+}%
+%
+\GreSyllable{\GreSetThisSyllable{}{ei}{gnt nine}{e}{ignt nine}}{}{\GreUnstyled}{1}{\GreSetNextSyllable{}{}{}{}{}}{}{15}{}{%
+\GreSyllableNoteCount{1}%
+\GreGlyph{\GreCPPunctum}{13}{\GreNextCustos{9}{}}{0}%
+{%
+\GreGlyphHeights{13}{13}%
+}{}{}%
+}%
+%
+\GreFinalDivisioFinalis{%
+}%
+\GreEndScore %
+\endinput %

tests/gabc-output/newlines.gabc

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+../gabc-gtex/newlines.gabc