Anyway, I found it's very hard to copy more than one line in Emacs, until I found some suggestion here and here. So to copy the current line without the newline you have to one of two (depends if you want copy or move the lines):
C-a C-Space C-e M-w
C-a C-Space C-e C-wIt means: C-a move to beginning of the line, C-Space sat the mark, C-e go to end line, M-w/C-w save/delete(kill) the region. "OK, but it only one line" you may save and you would be right. But to mark more line you just need to i.e. use arrow before marking a text (by M-w).