Add tags for new failing specs

Author: eregon

spec/tags/core/kernel/lambda_tags.txt

@@ -1 +1,2 @@
 fails:Kernel.lambda allows long returns to flow through it
+fails:Kernel.lambda creates a lambda-style Proc when called with zsuper

spec/tags/core/kernel/printf_tags.txt

@@ -131,3 +131,4 @@ fails:Kernel.printf formatting io is specified other formats % alone raises an A
 fails:Kernel.printf formatting io is specified faulty key sets the Hash as the receiver of KeyError
 fails:Kernel.printf formatting io is specified faulty key sets the unmatched key as the key of KeyError
 fails:Kernel.printf formatting io is not specified other formats % alone raises an ArgumentError
+fails:Kernel.printf formatting io is specified faulty key raises a KeyError

spec/tags/core/string/modulo_tags.txt

@@ -2,3 +2,21 @@ fails:String#% output's encoding is the same as the format string if passed valu
 fails:String#% output's encoding negotiates a compatible encoding if necessary
 fails:String#% output's encoding raises if a compatible encoding can't be found
 fails:String#% raises an error if single % appears at the end
+fails:String#% returns a String in the same encoding as the format String if compatible
+fails:String#% returns a String in the argument's encoding if format encoding is more restrictive
+fails:String#% raises Encoding::CompatibilityError if both encodings are ASCII compatible and there ano not ASCII characters
+fails:String#% other formats c raises ArgumentError if argument is an empty string
+fails:String#% other formats c supports Unicode characters
+fails:String#% other formats s does not try to convert with to_str
+fails:String#% other formats % alone raises an ArgumentError
+fails:String#% flags (digit)$ raises exception if argument number is bigger than actual arguments list
+fails:String#% flags # applies to format o does nothing for negative argument
+fails:String#% flags # applies to formats bBxX does nothing for zero argument
+fails:String#% flags # applies to formats aAeEfgG forces a decimal point to be added, even if no digits follow
+fails:String#% flags # applies to gG does not remove trailing zeros
+fails:String#% flags - left-justifies the result of conversion if width is specified
+fails:String#% flags 0 (zero) applies to numeric formats bBdiouxXaAeEfgG and width is specified uses radix-1 when displays negative argument as a two's complement
+fails:String#% flags * left-justifies the result if width is negative
+fails:String#% flags * left-justifies the result if specified with $ argument is negative
+fails:String#% precision string formats determines the maximum number of characters to be copied from the string
+fails:String#% reference by name %{name} style supports flags, width and precision

spec/tags/core/string/undump_tags.txt

@@ -0,0 +1 @@
+fails:Thread#inspect has a binary encoding

spec/tags/core/thread/inspect_tags.txt

@@ -0,0 +1 @@
+fails:Thread#to_s has a binary encoding