Adding warning for running from bare cmd
Call ImmutableList<T>.AddRange from ConvertAll and FindAll

Replace any remaining calls to ImmutableList<T>+Node.Add and
ImmutableList<T>+Builder.Add from within a loop to calls to the
equivalent AddRange method
Remove import of System.Linq, reference namespace explicitly.
Fix misspelled Utf8NullTerminatedStringStartsWithAsciiPrefix
Fix comment typos in MemoryBlock
Fix misspelled test Utf8NullTerminatedStringStartsWithAsciiPrefix
Fast implementation of Hamming weight

The target method: System.Reflection.Internal.BitArithmetic.CountBits
Old implementation uses 24 arithmetic operations
New fast implementation uses 12 arithmetic operations
System.Xml.XDocument Typos

System.Xml.XDocument Typos removed tabs in typo fixes
System.Xml.XmlDocument Typos

System.Xml.XmlDocument removed tabs from typo fixes
System.Xml.XPath Typos

System.Xml.XPath removed tabs in typo fixes

System.Xml.XPath undo wrong typo fix
System.Xml.XPath.XmlDocument Typos
System.Reflection.Metadata Typos
System.Numerics.Vectors Typos

System.Numerics.Vectors removed tabs in typo fixes
System.Collections.Immutable Typos

System.Collections.Immutable removed tabs from typo fixes
Limit application of the JitIntrinsicAttribute

This attribute should limit where it can be placed to something that the
JIT will respect.
Remove unnecessary allocations from Keys, Values, and ContainsValue members
Merge pull request #169 from briangru/master

Limit application of the JitIntrinsicAttribute
Adding badges for pull request and issue times.
Merge pull request #173 from Petermarcu/adding_badges

Adding badges for pull request and issue times.
Merge pull request #155 from AndreyAkinshin/FastHammingWeight

Fast implementation of Hamming weight