Patch 1.0

There are currently (.NET 4) 26 white space characters, as shown by following powershell command:
`[char]::MinValue..[char]::MaxValue|%{ if ([char]::IsWhiteSpace($_)) {'U+{0:X4}' -f [int]$_} }`

In this particular case it would appear that only U+0020 (ASCII 32) is of interest, because that is the only white space character in the default **stripStartCharacters** of the **StripableText** constructor. No other white space character can be part of **st.Pre**.