Fix coding style
./src/isf_default_imengine.h:248: [SPC_M_SEP]Extra space before ( in function call [whitespace/parens] [4]
./src/isf_default_imengine.h:251: Do not leave a blank line after "private:" [whitespace/blank_line] [3]
./src/isf_default_imengine.cpp:45: [SPC_M_SEP]Missing space after , [whitespace/comma] [3]
./src/isf_default_imengine.cpp:50: [SPC_M_SEP]Missing space after , [whitespace/comma] [3]
./src/isf_default_imengine.cpp:52: [SPC_M_SEP]Missing space after , [whitespace/comma] [3]
./src/isf_default_imengine.cpp:162: [SPC_M_SEP]Extra space before ( in function call [whitespace/parens] [4]
./src/isf_default_imengine.cpp:284: [SPC_M_SEP]Missing space after , [whitespace/comma] [3]
./src/isf_default_imengine.cpp:318: [LNE_R_TWS]Redundant blank line at the start of a code block should be deleted. [whitespace/blank_line] [2]
./src/isf_default_imengine.cpp:326: [SPC_M_SEP]Extra space before ( in function call [whitespace/parens] [4]
Change-Id: Ied6acbf1d274194480eca89e9f4be046ea66fae4