Number issues

• COMPLEX-ATAN-BRANCH-CUT:TWEAK
  
• COMPLEX-ATANH-BOGUS-FORMULA:TWEAK-MORE
  
• COMPLEX-RATIONAL-RESULT:EXTEND
  
• CONTAGION-ON-NUMERICAL-COMPARISONS:TRANSITIVE
  
• EXPT-RATIO:P.211
  
• FIXNUM-NON-PORTABLE:TIGHTEN-DEFINITION
  
• FLOAT-UNDERFLOW:ADD-VARIABLES
  
• FLOATING-POINT-CONDITION-NAMES:X3J13-NOV-89
  
• IEEE-ATAN-BRANCH-CUT:SPLIT
  
• LCM-NO-ARGUMENTS:1
  
• REAL-NUMBER-TYPE:X3J13-MAR-89