Add trait bound ToString to Cell::new()/Cell::new_align()

[iosmanthus]

After adding trait bound ToString to Cell::new()/Cell::new_align(), maybe it will be more convenient to construct a row from another type because it will be unnecessary to transform the content to &str explicitly.

[codecov[bot]]

Codecov Report

Merging #94 into master will increase coverage by 0.08%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #94      +/-   ##
==========================================
+ Coverage   84.05%   84.13%   +0.08%     
==========================================
  Files           5        5              
  Lines        1179     1179              
==========================================
+ Hits          991      992       +1     
+ Misses        188      187       -1

Impacted Files	Coverage Δ
src/cell.rs	86.02% <100%> (+0.43%)	:arrow_up:

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[iosmanthus]

If I want to construct a Table from a matrix dynamically, I can implement it in the following code.

fn pretty_matrix(matrix: [[u8; 16]; 16]) -> Table {
    let mut table = Table::new();
    matrix.iter().for_each(|line| {
        table.add_row(Row::new(
            line.iter().map(|x| Cell::new(&x.to_string())).collect::<Vec<_>>(),
        ));
    });
    table
}

Now, the code becomes:

fn pretty_matrix(matrix: [[u8; 16]; 16]) -> Table {
    let mut table = Table::new();
    matrix.iter().for_each(|line| {
        table.add_row(Row::new(
            line.iter().map(|x| Cell::new(x)).collect::<Vec<_>>(),
        ));
    });
    table
}

[iosmanthus]

@phsym ping

[iosmanthus]

@phsym ping

[Jedsek]

@phsym ping

[Jedsek]

@iosmanthus cell!() could convert expression to string automatically, but Cell::new has no appropriate trait bounds.It is so strange.