Merge branch 'string-fix' into 'master'

src/SparseTransform.CLI/Program.cs

src/SparseTransform.Tests/Library/ConversionManagerTests.cs

src/SparseTransform.Tests/Library/Convert/DotWriterTests.cs

...Transform.Tests/Library/Convert/MatrixMarketWriterTest.cs

src/SparseTransform/Convert/DotWriter.cs

src/SparseTransform/Convert/ErrorListener.cs

src/SparseTransform/Convert/MatrixMarketReader.cs

src/SparseTransform/Convert/MatrixMarketWriter.cs