Bug fix for erroneous syntax in dyn_em/module_first_rk_step_part1.F

[islas]

TYPE: bug fix

KEYWORDS: syntax

SOURCE: internal

DESCRIPTION OF CHANGES:
Problem:
Wrong Fortran syntax most likely being corrected by standard.exe

Solution:
Fix the syntax error

LIST OF MODIFIED FILES:
M dyn_em/module_first_rk_step_part1.F

RELEASE NOTE:
Bug fix for erroneous syntax in dyn_em/module_first_rk_step_part1.F

[islas]

This should normally be based on master for a bug fix, but is required by #1896 to properly work

[mgduda]

Looks good to me. From the Fortran 2003 standard, 3.3.1.2 Free form statement continuation:

If a noncharacter context is to be continued, an “&” shall be the last nonblank character on the line,
or the last nonblank character before an “!”. There shall be a later line that is not a comment; the
statement is continued on the next such line. If the first nonblank character on that line is an “&”, the
statement continues at the next character position following that “&”; otherwise, it continues with the
first character position of that line.

[weiwangncar]

The regression test results:

Test Type              | Expected  | Received |  Failed
= = = = = = = = = = = = = = = = = = = = = = = =  = = = =
Number of Tests        : 23           24
Number of Builds       : 60           57
Number of Simulations  : 158           150        0
Number of Comparisons  : 95           86        0

Failed Simulations are: 
None
Which comparisons are not bit-for-bit: 
None