Fix coding style

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