combo: clarify the documentation for infer_arity()
combo: clarify the documentation for infer_arity()

It does what I think it did. I checked. I exanded the documentation to
make this more clear.

rodsol/opencog,gavrieltal/opencog,kinoc/opencog,roselleebarle04/opencog,printedheart/atomspace,kim135797531/opencog,MarcosPividori/atomspace,AmeBel/opencog,misgeatgit/opencog,prateeksaxena2809/opencog,cosmoharrigan/atomspace,Selameab/atomspace,ceefour/opencog,virneo/opencog,eddiemonroe/opencog,williampma/atomspace,inflector/atomspace,prateeksaxena2809/opencog,andre-senna/opencog,UIKit0/atomspace,sanuj/opencog,kinoc/opencog,rohit12/atomspace,kim135797531/opencog,ruiting/opencog,williampma/atomspace,ArvinPan/opencog,cosmoharrigan/opencog,williampma/opencog,AmeBel/atomspace,yantrabuddhi/atomspace,inflector/opencog,ceefour/opencog,misgeatgit/opencog,andre-senna/opencog,roselleebarle04/opencog,misgeatgit/opencog,MarcosPividori/atomspace,inflector/atomspace,jlegendary/opencog,misgeatgit/atomspace,roselleebarle04/opencog,printedheart/atomspace,rTreutlein/atomspace,Selameab/opencog,Allend575/opencog,Tiggels/opencog,kim135797531/opencog,printedheart/opencog,jlegendary/opencog,sanuj/opencog,Tiggels/opencog,andre-senna/opencog,gaapt/opencog,ruiting/opencog,gaapt/opencog,virneo/atomspace,andre-senna/opencog,sanuj/opencog,ceefour/opencog,rTreutlein/atomspace,iAMr00t/opencog,sumitsourabh/opencog,williampma/atomspace,prateeksaxena2809/opencog,ArvinPan/atomspace,kim135797531/opencog,gaapt/opencog,ceefour/atomspace,Tiggels/opencog,cosmoharrigan/atomspace,misgeatgit/opencog,gavrieltal/opencog,TheNameIsNigel/opencog,kinoc/opencog,printedheart/opencog,MarcosPividori/atomspace,rohit12/opencog,jlegendary/opencog,jlegendary/opencog,inflector/opencog,shujingke/opencog,tim777z/opencog,ceefour/opencog,anitzkin/opencog,yantrabuddhi/opencog,eddiemonroe/atomspace,andre-senna/opencog,zhaozengguang/opencog,sanuj/opencog,ArvinPan/atomspace,yantrabuddhi/opencog,sumitsourabh/opencog,sumitsourabh/opencog,sanuj/opencog,jswiergo/atomspace,misgeatgit/opencog,williampma/atomspace,AmeBel/atomspace,shujingke/opencog,TheNameIsNigel/opencog,UIKit0/atomspace,inflector/opencog,AmeBel/atomspace,printedheart/opencog,Selameab/opencog,misgeatgit/opencog,eddiemonroe/atomspace,anitzkin/opencog,rodsol/opencog,inflector/opencog,tim777z/opencog,TheNameIsNigel/opencog,rohit12/opencog,rohit12/opencog,zhaozengguang/opencog,eddiemonroe/opencog,Selameab/atomspace,kim135797531/opencog,ruiting/opencog,TheNameIsNigel/opencog,andre-senna/opencog,AmeBel/opencog,sumitsourabh/opencog,printedheart/atomspace,ceefour/opencog,Allend575/opencog,tim777z/opencog,AmeBel/opencog,yantrabuddhi/opencog,gavrieltal/opencog,ruiting/opencog,rohit12/opencog,williampma/opencog,ArvinPan/opencog,inflector/opencog,virneo/opencog,eddiemonroe/atomspace,williampma/opencog,cosmoharrigan/opencog,Selameab/opencog,ceefour/opencog,shujingke/opencog,inflector/atomspace,rohit12/opencog,anitzkin/opencog,tim777z/opencog,cosmoharrigan/atomspace,rTreutlein/atomspace,misgeatgit/opencog,eddiemonroe/opencog,virneo/opencog,zhaozengguang/opencog,ceefour/atomspace,kinoc/opencog,cosmoharrigan/opencog,anitzkin/opencog,cosmoharrigan/opencog,inflector/opencog,Allend575/opencog,anitzkin/opencog,roselleebarle04/opencog,shujingke/opencog,misgeatgit/atomspace,Tiggels/opencog,misgeatgit/opencog,gavrieltal/opencog,printedheart/atomspace,MarcosPividori/atomspace,AmeBel/opencog,prateeksaxena2809/opencog,williampma/opencog,ArvinPan/atomspace,rodsol/atomspace,virneo/atomspace,eddiemonroe/atomspace,eddiemonroe/opencog,zhaozengguang/opencog,roselleebarle04/opencog,cosmoharrigan/opencog,Selameab/atomspace,ArvinPan/opencog,eddiemonroe/opencog,Allend575/opencog,rodsol/opencog,misgeatgit/opencog,eddiemonroe/opencog,rodsol/opencog,kinoc/opencog,gavrieltal/opencog,kim135797531/opencog,AmeBel/atomspace,virneo/atomspace,shujingke/opencog,tim777z/opencog,UIKit0/atomspace,virneo/opencog,printedheart/opencog,gaapt/opencog,anitzkin/opencog,zhaozengguang/opencog,yantrabuddhi/opencog,inflector/opencog,ruiting/opencog,iAMr00t/opencog,ceefour/atomspace,misgeatgit/atomspace,gaapt/opencog,Allend575/opencog,sumitsourabh/opencog,rohit12/atomspace,jswiergo/atomspace,Selameab/opencog,TheNameIsNigel/opencog,kinoc/opencog,iAMr00t/opencog,inflector/atomspace,rodsol/opencog,ceefour/atomspace,yantrabuddhi/atomspace,ruiting/opencog,zhaozengguang/opencog,Selameab/opencog,Allend575/opencog,TheNameIsNigel/opencog,yantrabuddhi/opencog,jlegendary/opencog,misgeatgit/atomspace,rohit12/opencog,eddiemonroe/atomspace,AmeBel/opencog,williampma/opencog,AmeBel/opencog,ruiting/opencog,shujingke/opencog,ArvinPan/atomspace,AmeBel/opencog,eddiemonroe/opencog,cosmoharrigan/opencog,gaapt/opencog,virneo/opencog,rohit12/atomspace,jlegendary/opencog,williampma/opencog,UIKit0/atomspace,ArvinPan/opencog,rodsol/atomspace,printedheart/opencog,gavrieltal/opencog,cosmoharrigan/atomspace,prateeksaxena2809/opencog,yantrabuddhi/atomspace,prateeksaxena2809/opencog,yantrabuddhi/atomspace,Tiggels/opencog,sumitsourabh/opencog,virneo/opencog,printedheart/opencog,Tiggels/opencog,andre-senna/opencog,prateeksaxena2809/opencog,yantrabuddhi/opencog,jswiergo/atomspace,jswiergo/atomspace,gavrieltal/opencog,kinoc/opencog,rTreutlein/atomspace,tim777z/opencog,ArvinPan/opencog,roselleebarle04/opencog,gaapt/opencog,anitzkin/opencog,virneo/opencog,rohit12/atomspace,virneo/atomspace,ceefour/opencog,rodsol/atomspace,roselleebarle04/opencog,yantrabuddhi/opencog,rTreutlein/atomspace,yantrabuddhi/atomspace,kim135797531/opencog,Selameab/opencog,sanuj/opencog,shujingke/opencog,misgeatgit/atomspace,inflector/opencog,jlegendary/opencog,ArvinPan/opencog,sumitsourabh/opencog,iAMr00t/opencog,inflector/atomspace,AmeBel/atomspace,Allend575/opencog,rodsol/atomspace,Selameab/atomspace,iAMr00t/opencog,rodsol/opencog,iAMr00t/opencog