Provides the source text for an assertion statement and translates coordinates in the original source text to coordinates relative to the assertion's (normalized) source text.
Constructs a SourceText by reading the given assertion's source text from the given source unit.
stat- an assertion statement
sourceUnit- the source unit containing the assertion statement
janitor- a Janitor for cleaning up reader sources
Returns the column in getNormalizedText() corresponding to the given line and column in the original source text. The first character in the normalized text has column 1.
line- a line number
column- a column number
Returns the assertion's source text after removing line breaks.
Limitation: Line comments within the assertion's source text are not handled.