Windows carriage return characters

We should consider changing these files to not be in DOS mode:

$ grep -r $'\r' -l `find . | grep "\.m2$"` | grep -v build
./M2/submodules/frobby/scripts/hilbert.m2
./M2/Macaulay2/packages/EigenSolver.m2
./M2/Macaulay2/packages/GradedLieAlgebras/tut.m2
./M2/Macaulay2/packages/WeylGroups.m2
./M2/Macaulay2/packages/ToricVectorBundles.m2
./M2/Macaulay2/packages/NumericalAlgebraicGeometry/SYSTEMS/EXA/Vision/specialTrifocalSlices.m2
./M2/Macaulay2/packages/NumericalImplicitization.m2
./M2/Macaulay2/packages/Matroids/tests-Matroids.m2
./M2/Macaulay2/packages/ExteriorModules.m2
./M2/Macaulay2/packages/SpechtModule.m2
./M2/Macaulay2/packages/ConvexInterface.m2
./M2/Macaulay2/packages/MapleInterface.m2
./M2/Macaulay2/packages/EquivariantGB.m2
./M2/Macaulay2/packages/NumericalImplicitization/approxPoint.m2
./M2/Macaulay2/packages/CorrespondenceScrolls.m2
./M2/Macaulay2/packages/TSpreadIdeals.m2
./M2/Macaulay2/packages/VNumber.m2
./M2/Macaulay2/packages/Parametrization.m2
./M2/Macaulay2/packages/PHCpack/PHCpackDoc.m2
./M2/Macaulay2/packages/undistributed-packages/Polyhedra2.m2
./M2/Macaulay2/packages/Polyhedra.m2
./M2/Macaulay2/packages/Matroids.m2
./M2/Macaulay2/packages/OldPolyhedra.m2
./M2/Macaulay2/packages/ExteriorIdeals.m2
./M2/Macaulay2/packages/SRdeformations.m2
./M2/Macaulay2/packages/SpaceCurves.m2
./M2/Macaulay2/packages/OldToricVectorBundles.m2
./M2/Macaulay2/packages/Polyhedra/core/contains.m2
./M2/Macaulay2/packages/Polyhedra/core/cone/methods.m2
./M2/Macaulay2/packages/Polyhedra/extended/fan/methods.m2
./M2/Macaulay2/packages/Polyhedra/extended/standardConstructions.m2
./M2/Macaulay2/packages/Polyhedra/extended/minkowskiSum.m2
./M2/Macaulay2/packages/Polyhedra/extended/legacy.m2
./M2/Macaulay2/packages/Polyhedra/extended/directProduct.m2
./M2/Macaulay2/packages/Polyhedra/extended/incompare.m2
./M2/Macaulay2/packages/Polyhedra/extended/commonFace.m2
./M2/Macaulay2/packages/Polyhedra/extended/affineImages.m2
./M2/Macaulay2/packages/Polyhedra/loadFile.m2
./M2/Macaulay2/packages/AdjointIdeal.m2
./M2/Macaulay2/packages/supplanted-packages/Polyhedra.m2
./M2/Macaulay2/packages/PolyominoIdeals.m2
./M2/Macaulay2/tests/quarantine/newlines.m2
./bugs/LAcore/testSVD.m2
./bugs/LAcore/testSolve.m2
./bugs/mike/oneStep3.m2
./bugs/mike/1-schenck-os.m2
./bugs/mike/0-fgeiss-memleak.m2

Start by rerunning the grep command from the issue to confirm which .m2 files contain carriage returns. Normalize the listed files, then run the same search again and verify it returns no source files outside build directories.